over the past $5$ years, intel corp. founder Gorgon Moore donated over $7$ million dollars to environmental causes while Microsoft founder bill gates donated over $5$ million dollars to health, education, and libraries. These two entrepreneurs were the top givers in business week's annual list of the $50$ Most Generous Philanthropists. data on the total amount pledged and net worth $($in millions of dollars$)$ for the $50$ top givers are saved in the topgivers file.